A novel planar metamaterial design for electromagnetically induced transparency and slow light

Wang, Junqiao; Yuan, Baohe; Fan, Chunzhen; He, Jian‐Jun; Ding, Pei; Xue, Qianzhong; Liang, Erjun

doi:10.1364/oe.21.025159

Cited by 151 publications

(66 citation statements)

References 28 publications

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“…First, the gold nanoprism has stronger localization due to its sharper corner compared to a cuboid; 10,11 second, the variety of modes existing in the gold nanoprism makes coupling between the two nanoprisms much easier; 32 third, if the plasmonic microstructure is compared with the ''optical microcavity'', it is easy to see that the quality factor value (Q / 1/Dv) increases with the decrease of the linewidth of the transparency window brought about by the increased gap distance, as shown in Figure 3b, i.e., the photon lifetime increase corresponds to the strengthened slow-light effect. 33,34 We also investigated the dependence of the MIT lineshapes on the structural parameters, including the period of the dimers, the lateral length of the nanoprisms, the thickness of the gold nanoprisms, and different incident polarizations (detailed in the Supplementary Information). It was found that the MIT lineshape has an obvious red-shift with the increase of the period, whereas the lateral length and the gold thickness have little influence on the MIT.…”

Section: Resultsmentioning

confidence: 99%

An actively ultrafast tunable giant slow-light effect in ultrathin nonlinear metasurfaces

Shi

et al. 2015

Light Sci Appl

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A slow-light effect based on metamaterial-induced transparency (MIT) possesses great practical applications for integrated photonic devices. However, to date, only very weak slow-light effects have been obtained in metamaterials because of the intrinsic loss of metal. Moreover, no active control of slow-light has been achieved in metamaterials. Here, we report the realization of a giant slow-light effect on an ultrathin metasurface that consists of periodic arrays of gold nanoprism dimers with a thickness of 40 nm sandwiched between a multilayer-graphene micro-sheet/zinc oxide nanoparticle layer and a monolayer graphene/polycrystalline indium tin oxide layer. The strong field confinement of the plasmonic modes associated with the MIT ensures a tremendous reduction in the group velocity around the transparency window. A group index of more than 4 3 10 3 is achieved, which is one order of magnitude greater than that of previous reports. A large tunable wavelength range of 120 nm is achieved around the center of the transparency window when the pump light intensity is only 1.5 kW cm 22 . The response time is as fast as 42.3 ps. These results demonstrate the potential for the realization of various functional integrated photonic devices based on metasurfaces, such as all-optical buffers and all-optical switches. INTRODUCTIONThe slow-light effect plays an essential role in the field of nonlinear optics. Typical materials that have been used to achieve the slow-light effect include photonic crystals, optical fibers, and optical microcavities. [1][2][3][4][5] Recently, the slow-light effect has been realized based on metamaterial-induced transparency (MIT). 6-11 However, only a small group index of 100 was obtained in photonic metamaterials because of the relatively large intrinsic loss of metal. 6-11 Moreover, various functional integrated photonic devices, including ultrafast all-optical buffers and all-optical switches, require ultrafast control of the slow-light effect. Photonic metasurfaces offer a variety of opportunities to control light using flat and surface components and have attracted wide attention for their great practical applications in the field, such as optical computing, optical communications, and integrated photonic circuits. [12][13][14][15][16][17] To date, no ultrafast active control of the slow-light effect in metamaterials has been reported.In this letter, we report the realization of an ultrafast all-optical tunable giant slow-light effect in an ultrathin metasurface. The metasurface consists of periodic arrays of gold nanoprism dimers sandwiched between a multilayer-graphene micro-sheet/zinc oxide (ZnO) nanoparticle layer and a monolayer graphene/polycrystalline indium tin oxide (ITO) layer. The strong field confinement of the plasmonic modes associated with the MIT ensures a large reduction in the group velocity in the transparency window. The enhanced nonlinearity brought about by the quantum confinement (QC) effect provided by the ZnO nanoparticles and polycrystalline ITO nanograins, hot...

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Section: Resultsmentioning

confidence: 99%

An actively ultrafast tunable giant slow-light effect in ultrathin nonlinear metasurfaces

Shi

et al. 2015

Light Sci Appl

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“…Slow-and fast-light effects are an important index, and it can be described by the group index n g [30] n…”

Section: The Transmission Characteristics With Varying Geometric Paramentioning

confidence: 99%

Mode Splitting Based on the Coupling Between Modes of Two Nanodisks Cavities and a Plasmonic Waveguide

Aleem¹

2017

PIER M

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Abstract-A metal-insulator-metal (MIM) plasmonic waveguide coupled with two nanodisks as a resonator has been examined and numerically simulated with the finite-difference time-domain (FDTD) and analytically by the Temporal Coupling Mode Theory (CMT). Based on the three-level system, the strong destructive interference between the two resonators leads to the distinct mode splitting response. The characteristics of mode splitting show that there is anomalous dispersion with the novel fast-light feature at the resonance. Meanwhile, the slow light characteristic can also be achieved in the system at wavelengths of the split modes. The relationship between the transmission characteristics and the geometric parameters is examined. The results show that the modulation depth of the mode splitting transmission spectrum of 80% with 0.175 ps fast-light effect of resonance can be achieved, while for the two modes these values are around 30% with −0.18 ps slow light-effect. There is a good agreement between the FDTD simulated transmission features and CMT. The characteristics of the system indicate critical potential applications in integrated optical circuits such as slow-light and fast-light devices, optical monitoring, an optical filter, and optical storage.

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“…Plasmonic nanostructures are of considerable current interest because of their unusual electromagnetic and optical characteristics and the prominent applications in surface enhanced Raman scattering (SERS) [1], biological and chemical sensing [2], perfect light absorption [3], optical antennas and switching [4], slow-light devices [5], and imaging and cloaking. [6,7] The unique ability of plasmon to focus incident light into subwavelength regions near metal nanostructure surfaces can lead to very large local field concentration.…”

Section: Introductionmentioning

confidence: 99%

“…The results show that, both of the two resonances reveal a distinct plasmon shift with respect to a small fluctuation in the refractive index of the surrounding medium, and calculated average refractive index sensitivities are 900 nm/RIU and 493 nm/RIU, and corresponding figure of merits of two modes are 16 and 32 in vacuum, respectively. The sensing performance can be improved by changing the geometric parameters of planar metamaterial due to the plasmon modes coupling effect, which offer an excellent potential for optical nanosensing applications.& Elsevier B.V. All rights reserved.Plasmonic nanostructures are of considerable current interest because of their unusual electromagnetic and optical characteristics and the prominent applications in surface enhanced Raman scattering (SERS) [1], biological and chemical sensing [2], perfect light absorption [3], optical antennas and switching [4], slow-light devices [5], and imaging and cloaking. [6,7] The unique ability of plasmon to focus incident light into subwavelength regions near metal nanostructure surfaces can lead to very large local field concentration.…”

mentioning

confidence: 99%

Optical refractive nanosensor with planar resonators metamaterial

Wang

et al. 2015

Optics Communications

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A novel planar metamaterial design for electromagnetically induced transparency and slow light

Cited by 151 publications

References 28 publications

An actively ultrafast tunable giant slow-light effect in ultrathin nonlinear metasurfaces

An actively ultrafast tunable giant slow-light effect in ultrathin nonlinear metasurfaces

Mode Splitting Based on the Coupling Between Modes of Two Nanodisks Cavities and a Plasmonic Waveguide

Optical refractive nanosensor with planar resonators metamaterial

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